Onkyo-TXDS494-avr-sm维修电路原理图.pdf

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1、TX-DS494/HT-R490 Ref. No.3676 SAFETY-RELATED COMPONENT WARNING! COMPONENTS IDENTIFIED BY MARK ON THE SCHEMATIC DIAGRAM AND IN THE PARTS LIST ARE CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK. REPLACE THESE COMPONENTS WITH ONKYO PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL. MAKE LEAKAGE-CUR

2、RENT OR RESISTANCE MEASUREMENTS TO DETERMINE THAT EXPOSED PARTS ARE ACCEPTABLY INSULATED FROM THE SUPPLY CIRCUIT BEFORE RETURNING THE APPLIANCE TO THE CUSTOMER. 052001 SERVICE MANUALSERVICE MANUAL AV RECEIVER TX-DS494/HT-R490 STANDBY/ON OFFON POWER PHONES MASTER VOLUME BASSTREBLE AV RECEIVER TX-DS49

3、4 FMAMPHONOC DTAPEVIDEO 1DVD ABSPEAKERS DIMMER SURROUND DTS/ VIDEO 2 VCR AUDIO SELECTOR LISTENING MODE DSPSTEREODISPLAY STANDBY SP SELTUNINGPRESETMEMORYSW MODEDIGITAL INPUTFM MODE CLEAR RC -4 44 M RE MO TE CO NT RO LL ER INPUT SELECTOR SLEEPDIMMER DISPLAY CDTAPEPHONOTUNER D V DVIDEO 1VIDEO 2 SUR MOD

4、ESW MODE AUDIO SEL TUNER PRESET STANDBY/ON DISCMUTING DVDCDTAPE VOLUME TOP MENUMENU CH SEL RETURNSETUP TEST TONELEVEL ENTER MODE TVCABLE SATELLITEVCR STANDBY/ON CH TV/VCR CHTV VOL TV VOL BMDD BMPP,SMPP,BMPA,GMPA BMWT,BMWR,GMWT,GMWR GMGT 120V AC, 60Hz 230-240V AC, 50Hz 120/220-230V AC, 50/60Hz 220-23

5、0V AC 50/60Hz HT-R490 TX-DS494 120V AC,60Hz Black,Silver and Golden model Black model RadioFans.CN 收音机爱 好者资料库 TX-DS494/HT-R490 SEPECIFICATIONS # AMPLIFIER SECTION Continuous Average Power output (FTC) All channels:55 watts per channel min. RMS at 8 ohms, 2 channels driven from 20 Hz to 20 kHz with n

6、o more than 0.08% total harmonic distortion. 70 watts min. RMS at 6 ohms, 2 channels driven from 1 kHz with no more than 0.1% total harmonic distortion. Continuous Power output (DIN)75 watts 5 at 6 ohms Maximum Power output (EIAJ)100 watts 5 at 6 ohms Total Harmonic Distortion:0.08% at rated power (

7、Front) IM Distortion:0.08% at rated power (Front) Damping Factor:60 at 8 ohms (Front) Input Sensitivity and Impedance PHONO:2.5 mV, 50 kohms LINE (CD, TAPE, DVD, VIDEO 1, 2):200 mV, 50 kohms MULTICHANNEL INPUT (FRONT L/R, SURROUND L/R, CENTER):200 mV, 50 kohms (SUBWOOFER):36 mV, 50 kohms DIGITAL 2 (

8、COAXIAL):0.5 Vp-p, 75 ohms Output Level and Impedance Rec out (TAPE, VIDEO 2):200 mV, 2.2 kohms Pre out (SUBWOOFER):1 V, 2.2 kohms Phono Overload:110 mV RMS at 1 kHz, 0.5% T.H.D. Frequency Response:20 Hz to 100 kHz, +1/3 dB RIAA Deviation:20 Hz to 20 kHz, 0.8 dB Tone Control Bass:10 dB at 50 Hz Treb

9、le:10 dB at 10 kHz Signal-to-Noise Ratio Phono:80 dB (IHF-A, 5 mV input) CD/Tape:100 dB (IHF-A) VIDEO SECTION Input Sensitivity and Impedance VIDEO (DVD, VIDEO 1, 2):1 Vp-p, 75 ohms S VIDEO (DVD, VIDEO 1, 2):1 Vp-p, 75 ohms (Y) 0.28 Vp-p, 75 ohms (C) Output Level and Impedance VIDEO (VIDEO 2, MONITO

10、R):1 Vp-p, 75 ohms S VIDEO (MONITOR):1 Vp-p, 75 ohms (Y) 0.28 Vp-p, 75 ohms (C) TUNER SECTION FM Tuning Range:87.5-108.0 MHz (50 kHz steps) Usable Sensitivity Mono:11.2 dBf, 1.0 V (75 ohms) Stereo:17.2 dBf, 2.0 V (75 ohms) 50 dB Quieting Sensitivity Mono:17.2 dBf, 2.0 V (75 ohms) Stereo:37.2 dBf, 2.

11、0 V (75 ohms) Capture Ratio:2.0 dB Image Rejection Ratio North American models:40 dB Other models:85 dB IF Rejection Ratio:90 dB Signal-to-Noise Ratio Mono:76 dB Stereo:70 dB Alternate Channel Attenuation:55 dB Selectivity:50 dB (DIN) AM Suppression Ratio:50 dB Total Harmonic Distortion Mono:0.2% St

12、ereo:0.3% Frequency Response:30 Hz-15 kHz, 1.0 dB Stereo Separation:45 dB at 1 kHz 30 dB at 100 Hz-10 kHz AM Tuning Range North American models:530-1,710 kHz (10 kHz steps) European AC120V and AC220-230V MG; AC220-230V MP; AC230-240V MD; AC120V NAAF-7050 NAAF-6790 S-VIDEO SELECTOR VIDEO SELECTOR NAE

13、TC-7056 FOR TX-DS494FOR HT-R490 MONITOR V2 IN V1 IN DVD VCTLA VCTLB BA7625 BA7625 +5V +5V VCTLA VCTLB Mute +6dB +6dB (TX-DS494 ONLY) (TX-DS494 ONLY) PHONO EQ PHONO CD DIGITAL-1 DIGITAL-2 DIGITAL-3 LOCAL REGULATOR NADG-7049 NAAR-7044 NAETC-7047 NAETC-7045 (TX-DS494 ONLY) HEAD PHONE JACK NAPS-7051 NAS

14、W-7052 NAETC-7054 NAPS-7055 REGULATOR NAETC-7046 NADIS-7043 NAAF-7057 DIGITAL INPUT NAETC-6795 NAAF-6789 NAETC-6791 NAETC-6792 MULTI CH INPUT /TONEAF INPUT/VOLUME TU Mute 0dB 0dB 0dB 0dB -3dB -3dB SURROUND MIX MIC MIX LFE MIX 0dB +1dB/+11dB +1dB/+11dB +1dB +1dB +8.4dB +8.4dB +8.4dB +27dB +4.2dB +4.2

15、dB +4.2dB +6dB 0dB 0dB 0dB +3.3V +5V MICON,FL 5.6V VIDEO,TUNER 5V DSP 5V AUDIO -12V +12V +10.5dB +6dB +6dB +6dB +6dB +6dB -12dB -12dB Q3171 INPUT SELECTOR TC9273N-004 Q301 REC REC PLAY PLAY AK4526A A/D CONVERTER 2ch MONITOR OUT DVD VIDEO-1 VIDEO-2 IN RTADRH AB/_INT DIRCS KARACS DSPCS CODECRST SWMUTE

16、 SDI SDO SCLK FS96 ERROR DIRPD KARARST DSPRST BTADRL KEY SW FL TUBE PROTECT 70kHz 70kHz 70kHz 70kHz 70kHz 700Hz 2Vrms LFE 25kHz CENTER MIX MAIN BOARD 2Vrms 2Vrms FL 2Vrms FR 2Vrms MIXED MIXED DIRECT DIRECT RDS signal Control TU-L/R SURROUND SPEAKER TONE VR FRONT CH SURROUND CH FRONT SPEAKER SUB PT P

17、T PT DSP ROTARY ENCODER VOLUME DISPLAY SW C R L RS LS RT LT SW Mute SW Mute nearby SUBWOOFER PREOUT terminal. SUBWOOFER PREOUT CONVERTER D/A 6CH AM FREQ STEP REMOCON SENSOR RDS DECODER for MP TYPE RI MICROPROCESSOR OUT FM/AM TUNER TUNER UNIT DSP DSP COAXIAL COAXIAL OPTICAL AK4110 RECIEVER INTERFACE

18、DIGITAL FlashROM 2Mbit CS4926 DSP ANALOG IN/OUT 2Vrms RS 2Vrms C 2Vrms LS TAPE DVD VIDEO1 VIDEO2 SP out 21Vrms Max (8ohm) SP-B SP-A RLSPEAKERS CRSLS MULTI-CH BYPASS MULTI-CH DSP MULTI-CH DSP MULTI-CH DSP MULTI-CH DSP MULTI-CH BYPASS POWER MWT only POWER SW AC IN POWER RELAY RI AM FREQ STEP MJ; AC100

19、V PROTECT PROTECT +29dB +29dB SPEAKERS +29dB +29dB +29dB TC9482N -B MAIN AMP +B POWER TRANS FL AC CENTER SPEAKER TX-DS494/HT-R490 BLOCK DIAGRAM U7 DISPLAY CIRCUIT PC BOARD U8 MAIN PC BOARD U6 SECONDARY TERMINAL PC BOARD U9 HEAD PHONE JACK PC BOARD U4 SURROUND SPEAKER TERMINAL PC BOARD U2 SURROUND CH

20、ANNEL POWER AMPLIFIER PC BOARD U3 FRONT SPEAKER TERMINAL PC BOARD U1 FRONT CHANNEL POWER AMPLIFIER PC BOARD U10 MASTER VOLUME PC BOARD U21 MULTI CHANNEL INPUT TERMINAL PC BOARD U23 U13 DSP CIRCUIT PC BOARD U14 INPUT TERMINAL PC BOARD U20 VIDEO TERMINAL PC BOARD U19 REGULATOR CIRCUIT PC BOARD U18 PRI

21、MARY TERMINAL PC BOARD U16 POWER SWITCH PC BOARD U15 PRIMARY CIRCUIT PC BOARD A 1 2 3 4 5 BCDEFG P401 P401 P402 Q932 X7001 5MHZ X701 12.288MHZ X702 12.2MHZ AM FM U7201 TORX178B Q201,203,204 BA7625 Q261 NJM4565M-D Q243 NJM4558L-D Q243 NJM4558L-D Q241 NJM4558L-D Q241 NJM4558L-D Q302 NJM4565M-D Q809 Q8

22、08 NJM4565M-D Q803 NJM4565M-D Q808 NJM4565M-D Q3501 NJM4565M-D Q3301 NJM4565M-D Q3301 NJM4565M-D Q302 NJM4565M-D Q804 NJM4565M-D Q3181,3183 NJM4565M-D Q3181 NJM4565M-D Q3281,3183 NJM4565M-D Q3581 NJM4565M-D Q3581 NJM4565M-D Q3381 NJM4565M-D Q3381 NJM4565M-D Q3281 NJM4565M-D Q701 Q704 Q703 OSC TC7WU0

23、4 Q705,706,707 Q1001 BU1923 Q801 Q805 NJM4565M-D Q809 Q807 NJM4565M-D Q807 NJM4565M-D Q806 NJM4565M-D Q806 NJM4565M-D Q805 NJM4565M-D Q802 TC9162AF Q3151 TC9164AF Q405 Q406 Q202 Q221,Q222,Q223 Q3184 Q3284 Q3384 Q3484 Q3584 Q3684, Q3685 Q3182 Q3282 Q3690,3691 Q951 1 11 Q934 78M05 G IO Q931 78M56 G IO

24、 Q933 78M05 G IO Q921 78M12 G IO Q709 MPC28M33HF G IO Q922 79M12 GI O Q7001 MPD780208GF U7001 GP1U281X Q7004 15-BT-70GNK Q7201 74HCU04 13 12 Q7201 74HCU04 12 Q7201 74HCU04 98 DSP+5V +24V SWMUTE AUDIO+12V AUDIO-12V FL-29V FSWSLT FSWSCK FSWSDO HPIN FSWSLT FSWSDO FSWSCK I-PRO V-PRO SPARL SPBRL SPARL CD

25、 PHONO SPARL V-PRO I-PRO VOLSLT SDO SCK GAINCTL FMUTE FSWSLT FSWSDO FSWSCK -29V REGULATOR MW; AC120V and AC220-230V MG; AC220-230V MP; AC230-240V MD; AC120V NAAF-7050 NAAF-6790 S-VIDEO SELECTOR VIDEO SELECTOR NAETC-7056 FOR TX-DS494FOR HT-R490 MONITOR V2 IN V1 IN DVD VCTLA VCTLB BA7625 BA7625 +5V +5

26、V VCTLA VCTLB Mute +6dB +6dB (TX-DS494 ONLY) (TX-DS494 ONLY) PHONO EQ PHONO CD DIGITAL-1 DIGITAL-2 DIGITAL-3 LOCAL REGULATOR NADG-7049 NAAR-7044 NAETC-7047 NAETC-7045 (TX-DS494 ONLY) HEAD PHONE JACK NAPS-7051 NASW-7052 NAETC-7054 NAPS-7055 REGULATOR NAETC-7046 NADIS-7043 NAAF-7057 DIGITAL INPUT NAET

27、C-6795 NAAF-6789 NAETC-6791 NAETC-6792 MULTI CH INPUT /TONEAF INPUT/VOLUME TU Mute 0dB 0dB 0dB 0dB -3dB -3dB SURROUND MIX MIC MIX LFE MIX 0dB +1dB/+11dB +1dB/+11dB +1dB +1dB +8.4dB +8.4dB +8.4dB +27dB +4.2dB +4.2dB +4.2dB +6dB 0dB 0dB 0dB +3.3V +5V MICON,FL 5.6V VIDEO,TUNER 5V DSP 5V AUDIO -12V +12V

28、 +10.5dB +6dB +6dB +6dB +6dB +6dB -12dB -12dB Q3171 INPUT SELECTOR TC9273N-004 Q301 REC REC PLAY PLAY AK4526A A/D CONVERTER 2ch MONITOR OUT DVD VIDEO-1 VIDEO-2 IN RTADRH AB/_INT DIRCS KARACS DSPCS CODECRST SWMUTE SDI SDO SCLK FS96 ERROR DIRPD KARARST DSPRST BTADRL KEY SW FL TUBE PROTECT 70kHz 70kHz

29、70kHz 70kHz 70kHz 700Hz 2Vrms LFE 25kHz CENTER MIX MAIN BOARD 2Vrms 2Vrms FL 2Vrms FR 2Vrms MIXED MIXED DIRECT DIRECT RDS signal Control TU-L/R SURROUND SPEAKER TONE VR FRONT CH SURROUND CH FRONT SPEAKER SUB PT PT PT DSP ROTARY ENCODER VOLUME DISPLAY SW C R L RS LS RT LT SW Mute SW Mute nearby SUBWO

30、OFER PREOUT terminal. SUBWOOFER PREOUT CONVERTER D/A 6CH AM FREQ STEP REMOCON SENSOR RDS DECODER for MP TYPE RI MICROPROCESSOR OUT FM/AM TUNER TUNER UNIT DSP DSP COAXIAL COAXIAL OPTICAL AK4110 RECIEVER INTERFACE DIGITAL FlashROM 2Mbit CS4926 DSP ANALOG IN/OUT 2Vrms RS 2Vrms C 2Vrms LS TAPE DVD VIDEO

31、1 VIDEO2 SP out 21Vrms Max (8ohm) SP-B SP-A RLSPEAKERS CRSLS MULTI-CH BYPASS MULTI-CH DSP MULTI-CH DSP MULTI-CH DSP MULTI-CH DSP MULTI-CH BYPASS POWER MWT only POWER SW AC IN POWER RELAY RI AM FREQ STEP MJ; AC100V PROTECT PROTECT +29dB +29dB SPEAKERS +29dB +29dB +29dB TC9482N -B MAIN AMP +B POWER TR

32、ANS FL AC CENTER SPEAKER TX-DS494/HT-R490 TX-DS494/HT-R490 MICROPROCESSOR CONNECTION DIAGRAM Q7001: MPD78P0208GF K0 S7101 S7102 S7103 S7104 S7105 S7106 S7107 - K1 S7111 S7112 S7113 S7114 S7115 S7116 S7117 - K2 S7121 S7122 S7123 S7124 S7125 S7126 S7127 - K3 S7131 S7132 S7133 S7134 S7135 - - - * S7113

33、 : TX-DS494 only Europian model only P7003 Q701 AK4110 28 27 26252218 Q704 CS4926 DSP 18192036 67 U23 Q1001 141516 Q3171 TC9482N 16 15 14 Q301 TC9273N-004 Q802 TC9162AF 13 16 15 Q3151 TC9164AF 13 16 15 Q7004 15-BT-70GMK Q592 Q591 15 11 Q203,Q401,Q402 BA7625 Q951 S7001 MASTER VOLUME 11 17 Q801 AK4526

34、A Q3690,Q3691 Q3181,Q3182 6 10 Q707 LC372100PT Q3184,Q3284,Q3384,Q3484 Q3584,Q3684,Q3685 Q222,Q223 RI U7001 D7001 Q7003 K3 K2 K1 K0 Q7002 X7001 Q710 MICROPROCESSOR Q7001 MPD780208GF 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 VDD0 STBY/RCV0 FSWSDO FSWSCK FSWSLT R

35、DSDATA SDO SCK PLLCE RESET X1 X2 IC XT2 XT1 VDD1 VOL SLT SYS OUT DSP SDI DSP SDO DSP SCK KARCS DSPCS DSPRST AVSS AM9K/10K HPIN MODE ECHO K3 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 K2 K1 K0 AVDD AVREF SYSIN POFF RDSSCK REMIN VSS TUMUT AMUT ABOOT/INT KARRST CFGGAIN VDD GAINCTL CODE

36、CPD DIRPD DIRCS 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 P06 VLOAD P07 P08 P09 P10 P11 P12 P13 P14 P15 P16 P17 SPBRL SPARL VCTLA VCTLB POWER PROTECT ENC2 ENC1 CODEC CS FS96 ERF SWMUTE RDS SIG STEREO SD BTADRH BTADRL 100 99 98 97 96 95 94 93 92 91 90 8

37、9 88 87 86 85 84 83 82 81 1G 2G 3G 4G 5G 6G 7G 8G 9G 10G 11G 12G 13G 14G 15G P01 P02 P03 P04 P05 PHONES HEADPHONE INSERT SWITCH CONTROL SWITCH DIR TUNER UNIT BU1923 RDS DECODER MASTER VOLUME INPUT SELECTOR MIX MODE SELECTOR MULTI CH SELECTOR FL TUBE GRID 1G - 15G SEGMENT P01 - P05 SEGMENT P06 - P17

38、SPEAKER B RELAY SWITCH SPEAKER A RELAY SWITCH VIDEO SELECTOR POWER RELAY ROTARY ENCODER PROTECTOR DETECTOR CIRCUITCODEC SUBWOOFER MUTING SWITCH GAIN CONTROL SWITCH ROM MUTE SWITCH TUNER MUTE SWITCH POWER FAILURE DETECTOR REMOTE SENSOR STANDBY +5V +5V+5V +5V +5V INITIALIZING INITIALIZING BUFFER SYSTE

39、M RESET 5MHz OSC INVERTER +5V TX-DS494 only TX-DS494/HT-R490 No.FunctionI/ODescriptionNo.FunctionI/ODescription 1VDDIPower supply terminal. (+5V)38RDSSCKIClock input terminal from RDS decoder. 2STBY/RECVOSTANDBY/RECEIVED inductor control output terminal.39REMINISignal input terminal from remote sens

40、or. 3FSWSDOOData output terminal to function switch ICs.40VSSIPower supply terminal (GND). 4FSWSCKOClock output terminal to function switch ICs.41TUMUTOMuting control output terminal for tuner section. 5FSWSLTOLatch output terminal to function switch ICs.42AMUTOMuting control output terminal for amp

41、lifier section. 6RDSDATAIData input terminal from RDS decoder.43ABOOT/INTI/O AUTOBOOT and INTREQ I/O terminal for DSP(CS4296). 7SDOOData output terminal to PLL IC and Master volume IC (TC9482N).44KARRSTONot used. 8SCKOClock output terminal to PLL IC and Master volume IC (TC9482N).45CFGGAINONot used.

42、 9PLLCEOChip enable output terminal to PLL IC.46VDDIPower supply terminal (+5V). 10RESETISystem reset input terminal.47GAINCTLOGain control output terminal. 11X1OCeramic oscillator connection terminals.48CODECPDOPower down signal output terminal to CODEC(AK4526). 12X2IConnect 5.0MHz ceramic oscillat

43、or between the both terminals.49DIRPDOPower down signal output terminal to DIR (AK4110). 13GNDIInternal connection terminal.(to GND)50DIRCSOChip enable output terminal to DIR (AK4110). 14XT2OSub system clock output terminal. Not used.51BTADRLOOutput terminal to set LSB position of address to boot RO

44、M (MX29F002T). 15XT1ISub system clock input terminal. Not used.(to GND)52BTADRHOOutput terminal to set MSB position of address to boot ROM (MX29F002T). 16VddIPower supply terminal .(+5V)53SDIBroadcast detection input terminal. 17VOL SLTOLatch output terminal to Master volume IC(TC9482N).54STEREOISte

45、reo broadcast detection input terminal. 18SYSOUTOSystem code output terminal.55RDSSIGISignal input terminal from RDS decoder. 19DSPSDIIData input terminal from DIR(AK4110).56SWMUTEOSW Preout muting control output terminal for amplifier section. 20DSPSDOOData output terminal to DIR (AK4110),DSP(CS492

46、6,).57ERFIERF Signal input terminal from DIR(AK4110). 21DSPSCKOClock output terminal to DIR (AK4110),DSP(CS4926)58FS96OFS96 Signal output terminal to CODEC(AK4526) 22KARCSONot used.59CODECCSONot used. 23DSPCSOChip enable output terminal to DSP(CS4926).60ENC1IVolume control input terminal. 24DSPRSTOR

47、eset output terminal to DSP(CS4926).61ENC2IVolume control input terminal. 25AVSSIPower supply terminal.(GND)62PROTECTIDetection input terminal for protection circuit. 26AM9K/10KIInitializing input terminal for AM band step. 63POWERORelay control output terminal for power. 27HPINIDetection input term

48、inal from headphone.64VCTLBOVideo selector control output terminal. 28MODEIInitializing input terminal of operation mode. 65VCTLAOVideo selector control output terminal. 29ECHOINot used.66SPARLOControl output terminal for SPEAKER A relay. 30-33K3-K0IOperation key connection terminals.67SPBRLOControl

49、 output terminal for SPEAKER B relay. 34AVDDIPower supply terminal.(+5V)68-78P17-P7OSegment output terminals for FL tube. 35AVREFIReference voltage terminal.79VLOADPower supply terminal for FL tube. 36SYSINISystem code input terminal.80-85P6-P1OSegment output terminals for FL tube. 37POFFIPower failure detection terminal.86-100 15G-1GOGrid output terminals for FL tube. MICROPROCESSOR TERMINAL DESCRIPTIUON Q7001: MPD78P0208GF SCHEMATIC DIAGRAM-1 A 1 2 3 4 5 BCDEFG C328915